<!DOCTYPE html>
<html lang='en'>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <!-- 在vue中 只有data中的数据发生改变，就会更新视图 -->
        <button @click="count++">修改</button>
        <p>{{count}}</p>
    </div>
    <script>
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    count:0
                }
            },
        })
    </script>
</body>

</html>